Catalytic method of replacing halogen in halocarbons

摘要

As replacements for chlorofluorcarbons, hydro(chloro) fluorocarbons are synthesized by hydrogenating chlorofluorocarbons over a Pd/ZnO/. gamma.-- Al.sub.2 O3 catalyst. The ZnO is partially reduced before use and assists the Pd to function catalytically for days instead of hours despite the evolution of halogen.